DIN EN () Founding – Ultrasonic examination – Part 2: Steel castings for highly stressed components. Hello. The scope of this standard is for highly stressed components. Where is the limit? When can I know if one material is higly stressed or not. Licens k?bt af: Vesta Wind System A/S Dansk standard DS/EN 1. udgave St?bning – Ultralydunders?gelse – Del 2.
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12860-2 A is normative. The same coupling medium shall be used for calibration and all subsequent examination operations. ENFounding — Technical conditions of delivery — Part 2: NOTE 2 Annex C gives information on types of indications and on the determination of 126802- dimensions. NOTE It is recommended that the sensitivity setting of angle-beam probes is verified on real not artificial planar discontinuities cracks with dimensions in through-wall direction or on walls perpendicular to the surface and infinite to the sound beam.
This European Standard specifies the requirements for the ultrasonic examination of steel castings with ferritic structure for highly stressed components and the methods for determining internal discontinuities by the pulse echo technique.
A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions.
BS EN 12680-2:2003
For greater wall thicknesses, special agreements apply with respect to test procedure and recording levels. If the document is revised or amended, you will be notified by email. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. During probe movement the sound paths change, but all indications remain without measurable dimensions. Complete coverage of all areas specified for examination shall be conducted by carrying out systematically overlapping scans.
In these circumstances, the probe shoe should be contured to fit the casting shape see EN DS-publikationstyper Dansk Standard udgiver forskellige publikationstyper. NOTE 1 Annex B gives information on sound-beam diameters in order to distinguish between discontinuities with or 122680-2 measurable dimensions.
The location of reflection points shall be documented, e. Individual indication smainly in the same position in through-wall direction. A simultaneous reduction of backwall echo should be evaluated in accordance with Figure C. Already Subscribed to this document.
Group of indications, mainly non-resolvable individual indication. These sections relate to the sizes of castings ready for assembly finish machined.
The Eng-Tips staff will check this out and take appropriate action. The ultrasonic determination of the dimensions of a discontinuity with an accuracy sufficient for engineering applications is only possible under certain preconditions e.
Probes and transducer frequencies 5. In this case, the flat-bottomed or side-drilled hole diameter which can be detected with a signal-noise ratio of at least 6 dB shall be noted in the test report and the additional procedure shall be agreed between the manufacturer and the purchaser.
All echo indications from discontinuities with measurable 1268-02 shall be recorded, when the signal amplitude exceeds both the levels given in Table 3 and the criteria given in Figures 3 and 4. Distinction shall be made between the different types of indications given in Table 4.
21680-2 Distance gain size technique DGS The distance gain size technique makes use of a series of theoretically derived 112680-2 which link the soundbeam path, the 126880-2 gain and the diameter of a disc-shaped reflector which is perpendicular to the beam axis. It also gives information on range setting see 5.
In order to prove this qualification, it is recommended to certify personnel in accordance with EN Finishing welds which are deeper than 50 mm shall be subject to supplementary examination with other suitable angle probes. The dimension in through-wall direction of the discontinuity should be measured according to Figure 5.
Figure 4 — Recording and acceptance limits for volumetric indications with measurable dimensions in the core zone see also Figures C. Each location where indications to be recorded have been found, shall be marked and indicated in the test report.
EN – NDT Ultrasonic examination. Founding – Material engineering other topics – Eng-Tips
For examining zones close to the surface, twin-crystal 12860-2 normal or angle should be preferred. Dimension of indication range equal to or larger than the sound-beam diameter DF. The area of indication with measurable length but with non-measurable dimension in through-wall direction shall be calculated according to the formula given in Figure 2. Need more than one copy?
Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. If the echo height of this smallest detectable flat-bottomed or equivalent side-drilled hole diameter at the end of the test range to be assessed is less than 6 dB above the grass level, then the ultrasonic testability is eb.